tests: update test_mon_host_line_has_correct_value()
tests: update test_mon_host_line_has_correct_value()

since msgr2 introduction, this test must be updated.

Signed-off-by: Guillaume Abrioux <30a9df5a0293a6108675377fa1673f7aa713f915@redhat.com>

ceph/ceph-ansible,ceph/ceph-ansible